How did The Beast from the East affect Heat Pump performance?
We’ve been asked whether heat pumps perform in cold weather, so we decided to look at the recent period +/- 0 days around the 1st of march. During this time Ireland suffered unprecedented amounts of freezing temperatures and snowfall. It is a common misconception that air source heat pumps (ASHP) do not perform effectively at lower temperatures. However, this is not the case and, in this blog post, data analysis on 16 houses that suffered such weather conditions aims to prove that ASHP not only perform effectively but also continue to save the homeowner money. Costs and energy requirement comparisons were made between the ASHP and oil fuelled heating. ASHP costs were based on Irish electricity rates– 16.15c/kWh day rate (8am to 11pm) and 8c/kWh night rate (11pm to 8am), with 13.5% VAT added and 5% online discount. Oil costs were based on an 85% efficient boiler with oil costs of 69c/litre- an equivalent of 10c/kWh. Although the coefficient of performance (COP) of the ASHP dropped in lower temperatures for this period, cost savings remained high- around 45% to 50% of oil heating costs. Furthermore, the highest cost savings percentages were found on the coldest days, where more energy was required for heating.
You can read the full blog here